City of Culver CityAttn: Christine [email protected] Culver BoulevardCulver City, CA 90232 RE: Geotechnical review Washington & National public art commission Dyson & Womack reached out to a number of geotech firms. We requested a non-invasivevisual only geotech evaluation and proposal for further geotechnical work. The following firmsprovided viable responses.
Irvine Geotechnical, Inc.145 N. Sierra Madre Blvd. #1Pasadena, CA 91107 Geotechnologies, Inc.439 Western Ave.Glendale, CA 91201 Both firms provided a proposed scope of work and budget for the complete geotechnicalservices required. In addition, they provided comments on currently known factors at the site.Geotechnologies, Inc. has completed projects in the vicinity of the proposed artwork and bothfirms can provide all required tests and reports for selecting an appropriate foundation for thebelow ground conditions.
Geotechnologies, Inc.
The site is not located within an “Earthquake Fault Zone” as indicated on the Alquist-PrioloEarthquake Fault Zones maps prepared by California Division of Mines and Geology. The site islocated in an area designated as “Liquefiable” by the California Geological Survey SeismicHazard Zone Maps.
This office has provided geotechnical design input for several properties in the vicinity of thesite. Groundwater has been encountered on these projects between 22 and 30 feet below sitegrades. Soils of moderate strength and low expansion potential have been observed. Thenearby projects were not found to be subject to liquefaction. 1 Irvine Geotechnical, Inc.
Our records indicate that the subject property is underlain by fill and soil over alluvium. Theproperty is mapped by the California Geological Survey within a zone of required investigationfor earthquake induced liquefaction.
It is proposed to explore the site with the aid of a limited access, hollow-stem auger drill rig. Twoborings are planned for the exploration. Bulk and undisturbed samples of the earth materials willbe collected from the borings and returned to our soil laboratory for testing and analysis. Uponcompletion of the exploration and testing, a formal report will be prepared that containsrecommendations for design of foundations, temporary excavations, and drainage control. Thereport will evaluate the liquefaction potential of the site and contain recommendations forseismic design. The report will be suitable for use by the City of Culver City BuildingDepartment, your architect, structural engineer, and contractor. 2